🏷️ Basic Information

Make:

KTM

Model:

105 SX

Year:

2008

Market:

USA

Product Code:

KTM-105SX-USA-2008-ENGINE-PARTS-LIST

👋 Introduction

Vehicle Segment:

Performance Off-Road Motorcycle (Motocross)

Target Audience:

Enthusiasts, mechanics, technicians, and owners of the KTM 105 SX for parts identification and referencing.

Class Competitors:

Yamaha YZ85, Suzuki RM85, Kawasaki KX85, Honda CR85.

Manual Purpose:

Essential resource for accurate parts identification and visualization, crucial for maintenance, repair, and sourcing genuine KTM components.

📋 Manual Details

Engine Components:

Complete coverage of all engine parts, including internal components, external ancillaries, and related systems.

Assembly Diagrams:

Detailed exploded views illustrating part relationships and assembly order.

Estimated Pages:

50-75 (typical for a detailed parts list manual)

Type:

Engine Parts List / Exploded View Catalog

Language:

English

Format:

Digital (likely PDF or similar image-based format)

📖 Manual Coverage

Engine Assembly:

Cylinder, piston, crankshaft, connecting rod, bearings, seals, gaskets, lubrication system, cooling system (if applicable), ignition system components, intake and exhaust manifolds.

Part Identification:

Precise identification of every individual component with associated part numbers.

Part Number Lookup:

Facilitates identification of correct replacement parts for ordering and servicing.

Assembly Visualization:

Visual guidance for understanding the correct sequence and orientation of engine components during assembly or disassembly.

Depth:

Component-level identification and visualization. Does not include diagnostic procedures or repair instructions beyond part identification.

📊 Manual Specifications

File Type:

PDF

Searchability:

Likely image-based, with potential OCR for text recognition in newer digital versions.

Resolution:

High resolution for clear visualization of fine details and part numbers.

Binding:

N/A (Digital Format)

Paper:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Type:

Two-Stroke Single Cylinder

Displacement:

105 cc (approximate, actual may vary slightly based on bore/stroke)

Bore:

Approx. 54 mm

Stroke:

Approx. 46.5 mm

Cooling System:

Liquid-Cooled

Carburetion:

Likely Keihin PWK carburetor (e.g., 28mm)

Ignition:

Digital CDI

Exhaust System:

Expansion chamber with silencer

Horsepower:

Approx. 22-25 HP (estimated for this class and era)

Torque:

Approx. 12-14 Nm (estimated)

Fuel Type:

Unleaded Gasoline (with 2-stroke oil pre-mix)

Oil Mixture:

Typically 32:1 or 40:1 ratio (refer to specific KTM recommendations)

🔧 Transmission

Transmission Type:

6-Speed Manual

Clutch Type:

Wet Multi-Plate Clutch

Gear Selection:

Positive gear engagement

📐 Dimensions

Wheelbase:

Approx. 1260 mm (49.6 inches)

Seat Height:

Approx. 865 mm (34.1 inches)

Dry Weight:

Approx. 73 kg (160.9 lbs)

🛡️ Safety Features

Safety Classification:

Not applicable for off-road motorcycles in terms of automotive crash ratings.

Brakes Front:

Hydraulic Disc Brake (e.g., Brembo caliper, 210mm rotor)

Brakes Rear:

Hydraulic Disc Brake (e.g., Brembo caliper, 190mm rotor)

Suspension Front:

Upside-down telescopic forks (e.g., WP Suspension, 43mm diameter)

Suspension Rear:

Monoshock (e.g., WP Suspension)

💡 Technology Features

Infotainment System:

N/A (Purely performance-oriented motocross bike, no infotainment features).

Electronic Aids:

N/A (No electronic rider aids such as ABS, traction control, or riding modes).

Connectivity Features:

N/A

🔧 Maintenance

Oil Change Frequency:

Refer to the vehicle's specific owner's manual; typically after every few hours of hard riding for 2-strokes, or based on gearbox oil condition.

Air Filter Cleaning:

Frequent cleaning/replacement of the air filter is critical for 2-stroke engine longevity, especially in dusty conditions.

Spark Plug Replacement:

Regular inspection and replacement based on operating hours and performance.

Engine Oil Type:

High-quality 2-stroke premix oil specifically designed for racing motorcycles (e.g., Motorex, Bel-Ray).

Gearbox Oil Type:

SAE 75W/80 or SAE 10W/30 transmission oil suitable for wet clutches (e.g., Motorex Gear Oil).

Coolant Type:

Ethylene glycol-based coolant with corrosion inhibitors, or a specific KTM-approved coolant.

Common Wear Items:

Piston, piston rings, clutch plates, wheel bearings, fork seals, chain and sprockets are common wear items in high-performance 2-stroke motocross bikes.

Carburetor Tuning:

Carburetor jetting may require adjustment based on altitude, temperature, and modifications.

Exhaust Packing:

Silencer packing may degrade over time and require replacement to maintain performance and sound levels.

📚 Vehicle History

Brand Focus:

KTM AG is renowned for its off-road racing motorcycles and a strong heritage in motocross and enduro racing.

Lineage:

The SX line represents KTM's dedicated motocross platform. The 105 SX was a popular model in the junior motocross class, offering a step-up from 85cc machines.

Production Era:

The 105 SX was produced for a specific period to cater to junior racing regulations and rider development.

🏆 Awards & Recognition

Racing Success:

KTM motorcycles, including the SX models, have a significant history of winning championships in professional motocross and Supercross events worldwide. Specific awards for the 2008 105 SX model would be tied to rider performance in junior classes.